Script that checks if GitHub is up before running a command

if-github-up.sh

#!/bin/bash
#
# Script that checks GitHub's status API before continuing. If GitHub does not return "good" then
# you will be prompted whether you want to continue.
#
# Information messages are echoed to stderr so it is still possible to pipe the results of stdout to
# a file.
#
# Example Usage:
#   $ if-github-up make clean
#   $ if-github-up curl -s 'https://status.github.com/api/status.json' > github-status
#

status="$(curl -s 'https://status.github.com/api/status.json')"

if [[ "$status" != *"good"* ]]; then
  read -r -p "GitHub may be having problems. Proceed anyway? (yes/y) : " response
  response="$(tr A-Z a-z  <<< "${response}")"
  if [[ ! "${response}" =~ ^(yes|y)$ ]]; then
    exit 1
  fi
  echo "Ok, trying command anyway" >&2
else
  echo "GitHub looks good" >&2
fi

echo "Executing \"$@\"" >&2
exec "$@"